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After the ultra-low emission retrofitUltra-low emission retrofit, denitrificationDenitrification and desulfurizationDesulf+urization equipment were added to the flue gas system of blast furnace hot blast stovesHot blast stove, altering the original operational mode. This paper investigates the corrosion problems observed in heat exchangers of blast furnace hot blast stovesHot blast stove following the ultra-low emission retrofitUltra-low emission retrofit. The study includes phase analysisPhase analysis of corrosion products and examines the formation mechanism and key influencing factors of SO₂ in conjunction with the process flow. Additionally, the feasibility of corrosion mitigation measures—such as upgrading heat exchanger materials, structural modificationsModification, and process design optimization—is discussed.

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Analysis of Corrosion Issues in Blast Furnace Hot Blast Stove Heat Exchangers

  • 会议论文

  • 发表日期：

    2026年

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  • Jian Sun,
  • Fuming Zhang,
  • Yong Zhang,
  • Zefei Zhang,
  • Jianlong Wu,
  • Jiliang Zhou,
  • Han Zhang

摘要

After the ultra-low emission retrofitUltra-low emission retrofit, denitrificationDenitrification and desulfurizationDesulf+urization equipment were added to the flue gas system of blast furnace hot blast stovesHot blast stove, altering the original operational mode. This paper investigates the corrosion problems observed in heat exchangers of blast furnace hot blast stovesHot blast stove following the ultra-low emission retrofitUltra-low emission retrofit. The study includes phase analysisPhase analysis of corrosion products and examines the formation mechanism and key influencing factors of SO₂ in conjunction with the process flow. Additionally, the feasibility of corrosion mitigation measures—such as upgrading heat exchanger materials, structural modificationsModification, and process design optimization—is discussed.